Finding the Fourth Proportional to 1,418.07, 1,957.86 and 1,320.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.07 : 1,957.86 = 1,320.06 : x
2. Step 2: Convert to fraction form
   1,418.07/1,957.86 = 1,320.06/x
3. Step 3: Cross multiply
   1,418.07x = 1,957.86 × 1,320.06
4. Step 4: Simplify right side
   1,418.07x = 2,584,492.67
5. Step 5: Solve for x
   x = 2,584,492.67/1,418.07
6. Step 6: Final answer
   x = 1,822.54